CITIES IN SAN MATEO COUNTY

The County of San Mateo also referred to as the northern part of  "Silicon Valley" to many includes the cities of Atherton, Belmont, Brisbane, Burlingame, Colma, Daly City, East Palo Alto, Foster City, Half Moon Bay, Hillsborough, Menlo Park, Millbrae, Pacifica, Portola Valley, Redwood City, San Bruno, San Carlos, San Mateo, South San Francisco, and Woodside.   

SAN MATEO COUNTY HISTORY

San Mateo County was formed in 1856 upon the division of San Francisco County, one of the state's 18 original counties established at California statehood in 1850. Until 1856, San Francisco’s city limits extended west to Divisadero Street and Castro Street, and south to 20th Street. In 1856, it was divided. A straight line was drawn across the tip of the San Francisco Peninsula just north of the San Bruno Mountains. Everything south of the line became the new San Mateo County while everything north of the line became consolidated San Francisco County. In 1868 San Mateo County annexed part of northern Santa Cruz counties with the towns of Pescadero and Pigeon Point.  

san mateo county zip codes

Every bay-side San Mateo County ZIP code, by city

Tap a ZIP for its neighborhood page, or the "homes for sale" link to search listings in that ZIP right now. ZIP codes are mail routes, not city or school lines, so one ZIP can cross both.

city zip code pages homes for sale
Atherton 94027 94027
Belmont 94002 94002
Brisbane 94005 94005
Burlingame and Hillsborough 94010 94010
Colma and Daly City 94014 94015 94014 · 94015
East Palo Alto 94303 94303
Foster City 94404 94404
Menlo Park 94025 94025
Millbrae 94030 94030
Portola Valley 94028 94028
Redwood City 94061 94062 94063 94065 94061 · 94062 · 94063 · 94065
San Bruno 94066 94066
San Carlos 94070 94070
San Mateo 94401 94402 94403 94404 94401 · 94402 · 94403 · 94404
South San Francisco 94080 94080
Woodside 94062 94062

property nerd note

Some ZIPs cross city and county lines. 94303 covers East Palo Alto in San Mateo County and part of Palo Alto in Santa Clara County, and 94062 covers parts of Redwood City and Woodside. Always check the city and the school district for the exact address; our Silicon Valley schools guide shows how. Looking south? See Santa Clara County ZIP codes.

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